__________ stop fluid from leaking across an
epithelium. Fill in the blank(s) with the appropriate word(s).
Answer: Tight junctions
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Defend why is it unsurprising that two-component regulatory systems are all but absent in bacteria that live at the expense of a host?
What will be an ideal response?
Which two components of the endomembrane system share continuous membranes?
a. plasma membrane and Golgi apparatus b. endoplasmic reticulum and lysosomes c. nuclear membrane and endoplasmic reticulum d. Golgi apparatus and plasma membrane
Can Southern and northern blotting detect differences between WT and mutant ?-globin gene or between WT and mRNA or both?
A) Only differences between WT and the gene can be detected. B) Only differences between WT and the mRNA can be detected. C) Differences between the WT and both the gene and the mRNA can be detected. D) Neither differences between WT and the gene nor between WT and the mRNA can be detected.
Gram ________ bacteria stain purple and have a very simple cell wall, only consisting of peptidylglycan:
A. Positive B. Negative